Two years ago, Hoyos posted a clip to Facebook showing the female shark cruising ominously past an open-topped cage, dwarfing the divers. “I give you the biggest white shark ever seen in front of the cages in Guadalupe Island,” Hoyos wrote.

On Friday, Hoyos shared new footage showing what the researcher believes is Deep Blue swimming in the lightless depths at Guadalupe (video posted above).

Hoyos confirmed the depth of the sighting – nearly 500 feet – but did not say for sure whether the shark was, in fact, Deep Blue.

Guadalupe Island, 165 miles west of the Baja California port of Ensenada, is seasonal home to dozens of adult great white sharks. Many of the sharks are named, based on distinctive markings, and repeat divers look forward to seeing their favorite sharks on return trips.